POV-Ray : Newsgroups : povray.advanced-users : Fluid simulation Server Time
25 Nov 2024 12:41:36 EST (-0500)
  Fluid simulation (Message 1 to 6 of 6)  
From: Andrew Coppin
Subject: Fluid simulation
Date: 27 Oct 2002 05:39:48
Message: <3dbbc274@news.povray.org>
Simple question: is it possible to simulate the motion of a liquid (e.g.,
water), or is the math just too hellishly difficult without the help of a
supercomputer?

Andrew.


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From: Tim Nikias
Subject: Re: Fluid simulation
Date: 27 Oct 2002 05:48:25
Message: <3dbbc479$1@news.povray.org>
It is quite difficult. Here is a pretty good link
which can give you some insight to do your own
research with google:

http://graphics.stanford.edu/~fedkiw/

The techniques are pretty advanced and I'd say
very difficult, if not impossible, to implement with
POV-Script, and, parsing would be just breathtaking,
I guess.

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde

> Simple question: is it possible to simulate the motion of a liquid (e.g.,
> water), or is the math just too hellishly difficult without the help of a
> supercomputer?
>
> Andrew.
>
>
>


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From: Andrew Coppin
Subject: Re: Fluid simulation
Date: 27 Oct 2002 06:19:54
Message: <3dbbcbda@news.povray.org>
Thanks for the website - looks highly interesting! Will have to spend some
time looking through that one...

Andrew.


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From: Christopher James Huff
Subject: Re: Fluid simulation
Date: 27 Oct 2002 14:26:55
Message: <chrishuff-17184C.14192827102002@netplex.aussie.org>
In article <3dbbc274@news.povray.org>,
 "Andrew Coppin" <orp### [at] btinternetcom> wrote:

> Simple question: is it possible to simulate the motion of a liquid (e.g.,
> water), or is the math just too hellishly difficult without the help of a
> supercomputer?

It is not hard to do a very simplified simulation. You could use a 
particle system with completely independant particles, and have 
reasonable processing requirements. It won't be very realistic though.
You could do a more complex particle simulation with interacting 
particles, I've seen simulations of this type that were pretty 
convincing, but it is a lot slower. There are other types of simulation 
that each have their own strengths.
To do a really realistic simulation of water would require a very 
complex simulation and huge amounts of processing power, but you can 
usually get a convincing effect with much less. It depends on what you 
want...drops of water beading on a surface, paint pouring through a 
funnel, waves smashing on rocks.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/


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From: Andrew Coppin
Subject: Re: Fluid simulation
Date: 27 Oct 2002 15:35:33
Message: <3dbc4e15@news.povray.org>
Waves smashing on rocks? Woooooooohooooo! Like I have the computer power for
that! ;-)

But seriously... I know once upon a time this stuff was science fiction. It
seems that it can now be done. (Well, we have increased computer power in
the last few decades.) It seems that the computations can be made feasible -
it's just that the math is over my head. (Well, from what I've read on the
website Tim gave me 8^0 But then... what do *I* know about maths? :'(

Andrew.


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From: Alex
Subject: Re: Fluid simulation
Date: 28 Oct 2002 04:30:09
Message: <web.3dbd02fb12f66ac315e7f0160@news.povray.org>
Andrew Coppin wrote:
>Waves smashing on rocks? Woooooooohooooo! Like I have the computer power for
>that! ;-)
>

Try this:
"A Simple Model of Ocean Waves" - Alain Fournier, William T. Reeves - ACM
0-89791-196-2/86/008/0075

If you can't find the paper online, drop me a mail and I'll reply with a pdf
attached (quite large, 4MB or so).

Another one could be:
"Modeling Waves and Source" - Darwyn R. Peachey - ACM
0-89791-196-2/86/008/0065

Both of these models are largely superseded by Fedkiw and Foster models (of
"Shrek"
fame), but, due to their semplicity, are attractive for use in small
projects.

Fournier and Reeves model is particulary attractive for the ease of control
it gives to the animator.
Alex


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